The bald-headed 67-year-old Hudson, who often dresses in all black and punctuates his sermons with an evangelist’s growl and fervent “Hallelujahs,” says his messages are designed to be fun and reach audiences seeking a more loving God.

“We have a good time. We’re not boring and we don’t have a lot of rules,” Hudson said during a recent telephone interview. “The gospel is the good news, after all. People like it. And we get great results.”

Hudson and his wife, Mary, 67, have been globe-trotting evangelists for more than 40 years, but for the last few years, they’ve had a new way of being introduced: the parents of pop sensation Katy Perry (“I Kissed A Girl,” “Firework”).

The Hudsons are scheduled to preach at iWorship Center’s north campus, 3200 Shaler Road, at 10 and 11:30 a.m. Sunday.

Since 2008, Perry has had 13 singles reach the Top 10 on the Billboard magazine pop music chart, including the No. 1 singles “Dark Horse,” “Part of Me” and “Roar.” She’s also dated fellow pop stars Travie McCoy (of Gym Class Heroes) and John Mayer, and was briefly married to comedian Russell Brand — all of which has been dutifully reported by entertainment and gossip publications.

Perry at one time recorded Christian music under the name Katy Hudson (Perry is Mary Hudson’s maiden name). But she became a sensation with secular music, combining pop sensibilities with over-the-top fashion choices (and occasionally hair colors).

Hudson acknowledges that Perry’s stardom gives him a platform to the public, especially reaching out to new audiences.

“I can go up to a group of young people and they’ll talk to me,” says Hudson, whose ministry is based in Riverside, Calif. “They’ll ask questions about God. They love Katy and they want to hear what her dad has to say. So it’s already opened doors.”

‘They don’t want self-righteous’

The Hudsons are regularly introduced to crowds with Perry’s music.

But after Perry hit it big in 2008 with “I Kissed a Girl,” Keith Hudson admitted he thought, “my ministry is over.”

That, of course, didn’t happen. The elder Hudsons may not always be on board with their daughter’s public persona, but she remains their daughter.

“You don’t close the door on your children,” Hudson said.

The Rev. Eric Hansen, pastor at iWorship Center, says a friend with an entertainment company promoting this weekend’s Country Life Music Festival in Peoria told him about the Hudsons’ availability to preach in the area. Mary Hudson was a speaker at a benefit luncheon connected with the music festival Friday.

“Here’s a guy whose daughter is the biggest seller of her generation and people want to hear what her father has to say,” Hansen said.

Hansen has tried to reach the millennial generation and NextGen types with a variety of innovative ideas, including social media and a new downtown “bar church.” Those age groups, Keith Hudson says, have felt judged by more mainstream churches and weighed down by a lot of rules and regulations.

“This generation doesn’t want to hear that they can’t have their hair this long or they can’t wear this or can’t do this,” he said. “They don’t want self-righteous, condemning, better-than-you-are preachers. I come in with a lot of grace and a lot of love.

“The only thing that is going to change people is encouraging them with the love of God. That’s my job.”